// PostgreSQL Database Management System
// (formerly known as Postgres, then as Postgres95)
//
// Portions Copyright (c) 1996-2010, The PostgreSQL Global Development Group
//
// Portions Copyright (c) 1994, The Regents of the University of California
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written agreement
// is hereby granted, provided that the above copyright notice and this
// paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
// LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
// EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY
// OF SUCH DAMAGE.
//
// THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

/*-------------------------------------------------------------------------
 *
 * noblock.c
 *	  set a file descriptor as non-blocking
 *
 * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
 *	  $PostgreSQL: pgsql/src/port/noblock.c,v 1.15 2010/01/10 14:16:08 mha Exp $
 *
 *-------------------------------------------------------------------------
 */

#include "c.h"

#include <fcntl.h>


bool
pg_set_noblock(pgsocket sock)
{
#if !defined(WIN32)
	return (fcntl(sock, F_SETFL, O_NONBLOCK) != -1);
#else
	long		ioctlsocket_ret = 1;

	/* Returns non-0 on failure, while fcntl() returns -1 on failure */
	return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
#endif
}


bool
pg_set_block(pgsocket sock)
{
#if !defined(WIN32)
	int			flags;

	flags = fcntl(sock, F_GETFL);
	if (flags < 0 || fcntl(sock, F_SETFL, (long) (flags & ~O_NONBLOCK)))
		return false;
	return true;
#else
	long		ioctlsocket_ret = 0;

	/* Returns non-0 on failure, while fcntl() returns -1 on failure */
	return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
#endif
}
